Here's the thing folks. Regardless of who you think is in the wrong or in the right. Disney has final say, BOTTOM LINE!!! And Disney decided that Steve Whitmire's services were no longer. We can support Steve or show him utter disdain. But it's not going to make a shred of difference.
As a very passionate Muppets fan myself, to the point that I have spent tons of money on my personal collection and even have Kermit tattooed on my shin, I can respect, even love, that Steve felt he was taking a stand for the Muppets and the beloved frog in particular. But, it could also be said that Steve is, or was, a performer. And maybe sometimes as a performer you should just shut up and say your lines. Both sides can have compelling arguments.
But at the end of it all, instead of pointing fingers and playing "he said, she said." How about we all, as fans, just remember fondly all the great memories he has had a hand in (no pun intended) creating. A lot of people here have stated that it is a holiday tradition to watch Muppets Christmas Carol every year. That was Steve Whitmire's Kermit. The first you heard "Pictures in my Head" from the 2011's the Muppets and how that made you felt, again that was Whitmire's Kermit. Even if it's true he was difficult to work with, it doesn't change those great Steve Whitmire's Kermit moments. Does it?